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Sulphuric Acid

The compound/...

Question

The compound/s which react/s and soluble in excess of hot conc.NaOH solution is/are

A

B e (O H)_{2}

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B

A l (O H)_{3}

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C

Z n (O H)_{2}

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D

C r O_{3}

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Solution

The correct options are
A $B e (O H)_{2}$
B $A l (O H)_{3}$
C $Z n (O H)_{2}$
D $C r O_{3}$
A, B and C form beryllate, aluminate and zincate. D is acidic oxide and reacts with NaOH forming chromate.

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